Update readme

Author: swissspidy

README.md

@@ -6,10 +6,12 @@ Results are posted as comments to pull requests and as [GitHub Action job summar
 
 It collects data from the `Server-Timing` header and runs Lighthouse on a given set of URLs. 
 
-![Screenshot of a GitHub Action job summary output by this action](https://i.imgur.com/NONeYNq.png)
+<img width="1154" alt="Screenshot of a GitHub Action job summary output by this action" src="https://github.com/swissspidy/wp-performance-action/assets/841956/bb543ba2-a142-49d5-bb45-77d11f121824">
 
 ## Usage
 
+### Basic Example
+
 Add a workflow (`.github/workflows/build-test.yml`):
 
 ```yaml
@@ -36,16 +38,36 @@ jobs:
     - name: Install dependencies
       run: npm ci
 
-# Here's where you would run your custom build process
-# and configure & start the server environment.
-
-    - name: Start server
-      run: npx wp-env start
+# Here's where you would install dependencies, run your custom build process, etc.
 
     - name: Run performance tests
       uses: swissspidy/wp-performance-action@main
       with:
+        plugins: |
+          ./my-awesome-plugin
         urls: |
           http://localhost:8889/
           http://localhost:8889/?p=1
 ```
+
+### Advanced Example
+
+```yaml
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Run performance tests
+      uses: ./
+      with:
+        urls: |
+          /
+          /sample/page/
+        plugins: |
+          ./my-awesome-plugin
+          https://downloads.wordpress.org/plugin/performant-translations.zip
+          https://downloads.wordpress.org/plugin/wordpress-seo.zip
+        iterations: 5
+        repetitions: 1
+```